Hello,
The reason why it is difficult to have an answer is that Monarch has got 5 different types of A321.
Row 26 is the row by doors 3 in general. The view is limited.
Again in general row 10 is the row by doors 2 and does not give you a view. Row 11 is a bit different as it is a row of 6 seats behind row 10 which has 4 seats only. Therefore 11A and 11F offer excellent legroom, just behind door 2, and a great view.
The first 6 rows offer extra legroom which I would highly recommend except row 1 which has a bulkhead. So rows 2 to 6 are great, some having 2 windows.